AA 328 then DL 2570 at O'Hare
Dallas-Fort Worth → Chicago → Boston
Timetable, Chicago time
11:09AA 328 from Dallas-Fort Worth at the gate
10:35DL 2570 to Boston leaves the gate
23 h 26 apart on the timetable, overnight
DL 2570 leaves 23 h 26 after AA 328 arrives on the timetable: more than half a day, so not a connection we count.